Question: who constituency of the Rajya Sabha for coextensive with of West Bengal?
Paraphrase: who voting public of the Rajya Sabha for coextensive with of West Bengal?
SPARQL (Wikidata):  select distinct ?sbj where { ?sbj wdt:P3403 wd:Q1356 . ?sbj wdt:P31 wd:Q57156205 } 
Answer: West Bengal